@inproceedings{xin2015the, title={The hyperbolic quadratic eigenvalue problem}, author={Xin Liang, and Ren-Cang Li}, url={http://archive.ymsc.tsinghua.edu.cn/pacm_paperurl/20220424220330636783117}, booktitle={Forum of Mathematics, Sigma}, volume={3}, pages={e13}, year={2015}, }